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Message-ID: <20110518202932.GP17786@vostochny.stro.at>
Date: Wed, 18 May 2011 20:29:33 +0000
From: maximilian attems <max@...o.at>
To: Dan Rosenberg <dan.j.rosenberg@...il.com>
Cc: oss-security@...ts.openwall.com, klibc@...or.com
Subject: Re: [klibc] CVE request: klibc: ipconfig sh script
with unescaped DHCP options
On Wed, May 18, 2011 at 04:13:05PM -0400, Dan Rosenberg wrote:
> Might it be worth fixing the insecure temporary file usage?
>
> 122 snprintf(fn, sizeof(fn), "/tmp/net-%s.conf", dev->name);
> 123 f = fopen(fn, "w");
>
> What if someone else has already created that file, or put a symlink
> or hard link there?
for the initramfs case I don't see how.
outside of initramfs usage I'd agree that this needs fixing.
> What if someone overwrites your string with
> command injection characters despite your stripping?
please be more verbose, what example do you have in mind?
thank you for the review.
--
maks
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